You are in the NE and looking for a 12-17 year old used TC in good shape and for a low price. That may be a bit of a challenge.
On the plus side, your truck will handle most campers just fine - weight should not be an issue.
Your truck is a long bed, so you will want to avoid short bed campers.
You want to pull a trailer, so it will be easier if the camper has little or no rear overhang.
That leaves you with 8' or 8 1/2' campers.
Just the 2 of you will be traveling, so you do not need a "family sized" unit. Only you know if you can do with a standard 8' hardwall camper without slides and with a wet bathroom. We find it is plenty big & comfortable for 2 people, but not everybody does.
Since you like winter camping, you probably do not want a popup camper (although many of them are perfectly comfortable in cold weather).
There are a lot of different camper brands out there. All build good and bad units. Some better than others. The manufacturers with a better reputation may fetch a better price (think, for example, Bigfoot or Northern Lite). But after 15 years, in my opinion, the history of the camper is more important than the original build quality. You need a unit in good condition at a reasonable price more than you need one made by a specific manufacturer.
If you think you are not confident assessing the state of the camper, try to have it looked at by someone who is more knowledgeable.
Don't just look at rot/water intrusion issues. Also make sure that everything works as it should. Let the seller demonstrate all features.
A good used camper may be easier to find out west, or in the NW. There are just many more there.
Do you have a place to store the camper under a roof when not used, or will it be sitting in the open?
2014 Ford F350 XLT 6.2 SCLB + 2017 Northstar Arrow